Institute Newton C. Braga

Circuit Bench

Intermittent buzzer (CB20494E)
This two-tone buzzer can be powered by a solar panel. The circuit is from a 1991 documentation. The...
Digital Voltmeter (CB25562E)
This 4 1/2 digit digital voltmeter circuit was published in the April 1993 Electronics Now...
Neon Divider (CB6835E)
Found in ancient American documentation, this circuit produces a pulse every 8 Hz of a 400 Hz...